643245480743 has 4 divisors (see below), whose sum is σ = 643247253768. Its totient is φ = 643243707720.

The previous prime is 643245480737. The next prime is 643245480767. The reversal of 643245480743 is 347084542346.

643245480743 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-643245480743 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 643245480691 and 643245480700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643245489743) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123296 + ... + 1140917.

It is an arithmetic number, because the mean of its divisors is an integer number (160811813442).

Almost surely, 2^643245480743 is an apocalyptic number.

643245480743 is a deficient number, since it is larger than the sum of its proper divisors (1773025).

643245480743 is a wasteful number, since it uses less digits than its factorization.

643245480743 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1773024.

The product of its (nonzero) digits is 7741440, while the sum is 50.

The spelling of 643245480743 in words is "six hundred forty-three billion, two hundred forty-five million, four hundred eighty thousand, seven hundred forty-three".